HCQ's efficacy has been confirmed by many virologists worldwide. Even if there are studies that don't reach that conclusion (the ones that don't do not replicate the original Roault trials and/or have a conflict of interest in their funding) -- THOSE studies do not debunk or refute other studies.

I am convinced they are attacking HCQ precisely because it works.

By the way if you say anything positive about HCQ on r/Canada its a permanent ban.